Urinary system

This is a picture of the urinary system.

The urinary system includes the kidneys, bladder and tubes. These organs control the amount of water and salts that are absorbed back into the blood and what is taken out as waste. This system also acts as a filtering mechanism for the blood.

The circulatory system

This is a picture of the circulatory system.

The circulatory system is made up of the vessels and the muscles that help and control the flow of the blood around the body. This process is called circulation. The main parts of the system are the heart, arteries, capillaries and veins.
As blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta. The aorta is the largest artery in the body. The blood leaving the aorta is full of oxigen. This is important for the cells in the brain and the body to do their work. The oxygen rich blood travels throughout the body in its system of arteries into the smallest arterioles.

the phases of respiration

Picture of he expiration
In the expiration the leaves the lungs.
Picture of the inspiration.


During the inspiration the air enters in the lungs.

Respiratory System

This is a picture about the respiratory system.